Should I charge Li PO phones overnight

Battery: why you shouldn't leave your smartphone on the charging cable overnight

Batteries are usually empty exactly when you need your cell phone most urgently. Such a smartphone battery can last a long time if you pay attention to a few things. Our tips at a glance:

Usually the display consumes the most energy. "The battery can be saved if the brightness of the display is reduced," recommends Hannes Czerulla from the specialist magazine c't. In fact, displays are often set brighter than necessary. You only need full brightness when there is strong light - for example when the sun is shining. Dimming the display in the settings can have a significant impact on battery performance. Many smartphones also have a light sensor that adjusts the brightness as required, thus helping to save electricity.

Radio connections are also one of the top power guzzlers. This includes everything with which the device connects to the outside world. As a rule, mobile communications are always needed. It looks different with WLAN. When activated, it constantly searches for known networks. This does not necessarily make sense on the way and costs a lot of energy.

GPS often consumes power unnecessarily

Bluetooth is rarely required permanently and should therefore only be switched on when required. GPS also drains the battery. Positioning is only really necessary for a few apps anyway, such as navigation or running apps. Mostly it is only used to record user behavior - in most cases it can be deactivated without any disadvantages.

Czerulla has a trick for users who have a mobile phone contract with a low data transfer rate: "LTE radio consumes more power than 3G. So if you only use 3G, you can deactivate LTE."

If everything has been tried, but the charge level continues to melt, apps can be to blame, as some of them are programmed to be wasteful. They load the processor with unnecessary operations in the background and thus slow down the performance of the cell phone. The battery also suffers from this.

The electricity offenders can be easily identified via the settings. The apps are listed under Battery or Accumulator according to their power consumption - also according to how much power they use in the background. If an app falls out of line and consumes immense amounts of money, it should be deactivated or uninstalled. In the data usage settings, you can also restrict the querying of background data for individual apps. This can save the battery and also the data volume.

What you should consider when charging your smartphone

The charging behavior also plays an important role in the life and performance of the battery. "Much wisdom about battery usage still relates to nickel-metal hydride batteries (NiMH)," says Prof. Michael Brodmann from the Energy Institute of the Westphalian University of Applied Sciences in Gelsenkirchen. These batteries are mostly only available in battery form today, but not in modern smartphones. The following applies to NiMH batteries: Always fully charge and discharge in order to prevent the memory effect that made the battery weaker from time to time.

This does not apply to modern lithium-ion batteries (Li-Ion) and their successors, lithium-polymer batteries (Li-Po), says Brodmann. There is no memory effect here. On the contrary, it is advisable to charge the battery before the red zone and to disconnect it from the charger before it reaches the 100 percent mark. It would be ideal, but also a little impractical, to use the battery in the range of 30 to 70 percent charge. Below or above it is heavily used, which can shorten its lifespan. That is why it makes little sense to leave the cell phone on the charging cable overnight.

The battery should also not be exposed to extreme temperatures. The performance drops below 0 degrees Celsius. Temperatures of 40 degrees and more accelerate the aging process of the device. So perhaps it would be better not to put the phone in the outer pocket in winter, and in the shade in summer.

If all else fails and the battery runs out on the go, power banks can help. These are additional batteries that can be used as a charger. There is a vast selection of accessories. The Stiftung Warentest tested 20 power banks in "test" (06/2016) and found some significant differences in equipment, price and performance. However, there are good devices for less than 20 euros. If you want to generate the electricity for your smartphone in an environmentally conscious and sporty way, you can even do it with a USB bicycle dynamo. dpa